The association of (C-13)O molecular gas with IRAS sources in L1641

Chen, H.; Fukui, Y.; Iwata, T.

doi:10.1086/172823

Cited by 4 publications

(1 citation statement)

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“…These systems are usually hydrogen-poor objects and if 2FGL J1653.6-0159 is associated with an ultracompact system, the companion is likely a helium star or a white dwarf. Based on binary evolution calculations, 2FGL J1653.6-0159 is more likely a black widow system with a companion much less than 0.1 M ⊙ (Chen et al 2013). Recently, a new black widow system, PSR J1311-3430, was found to have an orbital period of 94 min and the companion is a helium rich star .…”

Section: Discussionmentioning

confidence: 99%

Discovery of an Ultracompact Gamma-Ray Millisecond Pulsar Binary Candidate

Kong

Jin

Yen

et al. 2014

ApJ

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We report multi-wavelength observations of the unidentified Fermi object 2FGL J1653.6-0159. With the help of high-resolution X-ray observation, we have identified an X-ray and optical counterpart of 2FGL J1653.6-0159. The source exhibits a periodic modulation of 75 min in optical and possibly also in X-ray. We suggest that 2FGL J1653.6-0159 is a compact binary system with an orbital period of 75 min. Combining the gamma-ray and X-ray properties, 2FGL J1653.6-0159 is potentially a black widow/redback type gamma-ray millisecond pulsar (MSP). The optical and X-ray lightcurve profiles show that the companion is mildly heated by the high-energy emission and the X-rays are from intrabinary shock. Although no radio pulsation has been detected yet, we estimated that the spin period of the MSP is ∼ 2 ms based on a theoretical model. If pulsation can be confirmed in the future, 2FGL J1653.6-0159 will become the first ultracompact rotation-powered MSP.

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Section: Discussionmentioning

confidence: 99%